Nature of the Business and Going Concern	12 Months Ended
Nature of the Business and Going Concern	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of the Business and Going Concern	Nature of the Business and Going Concern Nature of the Business Teligent, Inc. is a Delaware corporation incorporated in 1977 and is a specialty generic pharmaceutical company. Under its own label, the Company markets and sells generic topical and branded generic and generic injectable pharmaceutical products in the United States and Canada. In the United States, the Company currently markets 38 generic topical pharmaceutical products and four branded generic pharmaceutical products. In Canada, the Company sells over 32 generic and branded generic injectable products and medical devices. Generic pharmaceutical products are bioequivalent to their brand name counterparts. The Company also provides contract manufacturing services to the pharmaceutical, over-the-counter, ("OTC"), and cosmetic markets. The Company operates its business under one segment. Our common stock has traded on the Nasdaq Global Select Market, under the trading symbol “TLGT” since October 26, 2015. Teligent also develops, manufactures, fills, and packages topical semi-solid and liquid products for branded and generic pharmaceutical customers, as well as the OTC and cosmetic markets. These products are used in a wide range of applications from cosmetics and cosmeceuticals to the prescription treatment of conditions like dermatitis, psoriasis, and eczema. Teligent received its certification of expanded facility in the fourth quarter of 2018 and continued to develop and file ANDAs with the FDA in 2019. As the Company continues to execute the expansion of its development and commercial base beyond topical generics to include injectable generics, complex generics and ophthalmic generics (what we call our “TICO strategy”), it will compete in other markets, including the ophthalmic generic pharmaceutical market, and expects to face other competitors. Going Concern ASU 205-40 – Presentation of Financial Statements – Going Concern requires management to evaluate an entity’s ability to continue as a going concern within one year after the date the financial statements are available for issuance. Specifically, management is required to evaluate whether the presence of negative conditions or events, when considered individually and in the aggregate, raise substantial doubt about an entity’s ability to continue as a going concern. Substantial doubt exists when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date the financial statements are available for issuance. Management has identified the following negative conditions and events that raise substantial doubt about the Company’s ability to continue as a going concern as of December 31, 2019: •The Company has incurred significant losses and generated negative cash flows from operations in recent years and expects to continue to incur losses and generate negative cash flow for the foreseeable future. As a result, the Company had an accumulated deficit of $121.5 million, total principal amount of outstanding borrowings of $214.0 million, and limited capital resources to fund ongoing operations at December 31, 2019. These capital resources were comprised of cash and equivalents of $15.5 million at December 31, 2019 and the generation of cash inflows from working capital. The Company’s available capital resources may not be sufficient for it to continue to meet its obligations as they become due over the next twelve months if the Company cannot improve its operating results or increase its operating cash inflows. In the event these capital resources are not sufficient, the Company may need to raise additional capital through the sale of equity or debt securities, enter into strategic business collaboration agreements with other companies, seek other funding facilities, or sell assets. However, the Company cannot provide assurances that additional capital will be available on acceptable terms or at all. Moreover, if the Company is unable to meet its obligations when they become due over the next twelve months through its available capital resources, or obtain new sources of capital when needed, the Company may have to delay expenditures, reduce the scope of its manufacturing operations, reduce or eliminate one or more of its development programs, make significant changes to its operating plan or cease its operations. The accompanying financial statements do not include any adjustments that might result from the outcome of this uncertainty. •As disclosed in Note 17-Subsequent Events, the Company is subject to certain financial covenants as set forth in the April 6, 2020 amendments to the Senior Credit Facilities. These financial covenants include a trailing twelve months (“TTM”) Minimum Revenue covenant that is required to be met each quarterly period from March 31, 2020 through December 31, 2020, a TTM Minimum Adjusted EBITDA that is required to be met each quarterly period from March 31, 2021 through maturity, and a minimum liquidity covenant tested at all times through the term of the agreement. These amendments supersede the financial covenants included in the original and amended agreements disclosed in Note 6-Debt. In the event the Company is unable to comply with these covenants, or obtain a waiver from its lenders, the lender shall have the right, but not the obligation, to permanently reduce the commitment in whole or in part or to declare all or any portion of the outstanding balance due and payable. Furthermore, in the event that outstanding balances under the Ares Credit agreements are declared due and payable by the lender, the lenders of the 2023 Series A and Series B Unsecured Convertible Notes shall have the right, but not the obligation, to declare all of the outstanding balance due and payable as well. If the Company is unable to raise additional capital to meet these obligations, the Company may have to seek other strategic alternatives, including ceasing its operations. The accompanying financial statements do not include any adjustments that might result from the outcome of this uncertainty. •In June 2019, the Company received a de-listing notice from the NASDAQ due to its share price being below $1.00 for 30 consecutive trading days. The notice specified that the Company's share price must trade above $1.00 per share for ten consecutive trading days prior to December 2, 2019 in order to prevent its common stock from being de-listed. For the 180 days preceding December 2, 2019 the Company's share price remained below $1.00. The Company requested a second 180-day extension. NASDAQ denied its request and the Company chose to file for an appeal. The Company was granted a hearing date for the end of January 2020. Subsequent to the appeal hearing, NASDAQ set a deadline of April 17, 2020 for the Company to regain compliance with NASDAQ’s continuing listing requirements. In early March 2020 the COVID-19 global pandemic triggered a significant decline in global capital markets, including NASDAQ. In light of this significant decline, the Company requested NASDAQ to reconsider the April 17, 2020 deadline. NASDAQ agreed to the Company’s request and set a new deadline to regain compliance by June 1, 2020. In January 2020, the Company’s Board of Directors and shareholders approved a reverse stock split in the range of any whole number between five (5) and ten (10) to one (1). While the Company believes that the reverse stock split will ultimately increase its share price above $1.00 for the required ten consecutive trading days, it can provide no assurances that its shares will trade above $1.00 per share for the required time period. A de-listing from the NASDAQ would be a “Fundamental Change” under the Company’s 2023 Series A and Series B Unsecured Convertible Notes which triggers a right by the holders to require the Company repurchase the Convertible Notes. In such an event, the Company would need to seek financing to repurchase the Convertible Notes and there is no guarantee that such financing would be available or on terms acceptable to the Company. If noteholders demanded a repurchase of the notes and the Company could not finance the repurchase, it would be in default under the Indentures governing the Convertible Notes, and in that event the lenders of the Ares Credit agreements would have the right, but not the obligation, to declare all of the outstanding balance under those agreements due and payable as well. Therefore, in the event of the Company’s shares are de-listed from the NASDAQ, the Company would likely have to seek some combination of waivers from its lenders and noteholders and seek new capital through the sale of equity or debt securities. If the Company is unable to obtain such waivers or raise new capital to meet these obligations if they become due, it may have to seek other strategic alternatives, including ceasing operations. The accompanying financial statements do not include any adjustments that might result from the outcome of this uncertainty.